Horizontal RecyclerViews in verticale RecyclerView scrolling jerks

Question

Sto usando un layout in cui ho usato più RecyclerViews (orizzontale) come una vista elemento di RecyclerView. Il problema è che lo scorrimento verticale non è così fluido come mi aspetto. Ci sono alcuni jerks dentro mentre si scorre verticalmente (Parent RecyclerView).

Come rimuovere questi jerks a scorrimento verticale? Ho usato per impostare gli adattatori su RecyclerViews orizzontali nel metodo OnBindViewHolder() di Parent RecyclerView.

Answer 1

Ho risolto il problema. Le prestazioni di scorrimento sono molto migliori in questo caso. Non impostare gli adattatori su RecyclerViews orizzontali nel metodo OnBindViewHolder() di Parent RecyclerView. Invece di impostarlo al primo momento quando la vista viene creata tramite onCreateViewHolder() di RecyclerView con dataList vuota o nullo. Basta sostituire l'elenco dei dati del newsecondary con l'elenco null precedente su onBindViewHolder() e chiamare notifydataSetChanged() su HorizontalAdapetr. Questo è molto meglio di setAdapter() in onBindViewHolder().

Answer 2

Si può provare in questo modo

attività principale

public void initialize(List<List<ResponseObject>> responseObjectList) { 
    RecyclerView upperRecyclerView = (RecyclerView) this.findViewById(R.id.main_layout); 
    upperRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)); 
    VerticalAdapter adapter = new VerticalAdapter(this, responseObjectLists); 
    upperRecyclerView.setAdapter(adapter); 
    adapter.notifyDataSetChanged(); 
} 

verticale riciclato adattatore vista

public class VerticalAdapter extends RecyclerView.Adapter<VerticalAdapter.Holder> { 

    final private SearchActivity activity; 
    List<List<ResponseObject>> list; 

    public VerticalAdapter(SearchActivity activity, List<List<ResponseObject>> lists) { 
     this.list = lists; 
     this.activity = activity; 
    } 

    public Holder onCreateViewHolder(ViewGroup parent,int viewType) { 
     View itemLayoutView = LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.vertical_layout, null); 
     return new Holder(itemLayoutView); 
    } 

    public void onBindViewHolder(Holder viewHolder, int position) { 
     List<ResponseObject> objectList = list.get(position); 
     viewHolder.packageTitle.setText(objectList.get(0).getTag()); 
     ImageAdapter imageAdapter = new ImageAdapter(activity, objectList); 
     viewHolder.horizontalRecyclerView.setLayoutManager(new LinearLayoutManager(activity, LinearLayoutManager.HORIZONTAL, false)); 
     viewHolder.horizontalRecyclerView.setAdapter(imageAdapter); 
     viewHolder.horizontalRecyclerView.setNestedScrollingEnabled(false); 
     imageAdapter.notifyDataSetChanged(); 
    } 

    public final static class Holder extends RecyclerView.ViewHolder { 

     protected TextView packageTitle; 
     protected RecyclerView horizontalRecyclerView; 

     public Holder(View view) { 
      super(view); 
      this.packageTitle = (TextView) view.findViewById(R.id.recycleViewTitle); 
      this.horizontalRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView); 
      this.horizontalRecyclerView.setLayoutManager(new LinearLayoutManager(this.horizontalRecyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false)); 
      this.horizontalRecyclerView.setNestedScrollingEnabled(false); 
      horizontalRecyclerView.setAdapter(null); 
     } 
    } 

    public int getItemCount() { 
     return ListUtil.isEmpty(list) ? 0 : list.size(); 
    } 
} 

adattatore recycleview orizzontale

public class ImageAdapter extends  RecyclerView.Adapter<ImageAdapter.ViewHolder> { 

    private List<ResponseObject> mainPageResponseList; 
    private SearchActivity activity; 

    public ImageAdapter(SearchActivity activity, List mainPageResponseList) { 
     this.mainPageResponseList = mainPageResponseList; 
     this.activity = activity; 
    } 

    public ImageAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View itemLayoutView = LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.horizontal_layout_view, null); 
     ViewHolder viewHolder = new ViewHolder(itemLayoutView); 
     return viewHolder; 
    } 

    public void onBindViewHolder(ViewHolder viewHolder, int position) { 
     ResponseObject object = mainPageResponseList.get(position); 
     Util.setImageUsingGlide(object.getImage(), viewHolder.imageView); 
     viewHolder.packageName.setText(object.getDestination()); 
     viewHolder.packagePrice.setText(object.getPrice() + ""); 
     viewHolder.imageView.setOnClickListener(null); 
    } 

    public final static class ViewHolder extends RecyclerView.ViewHolder { 

     protected ImageView imageView; 
     protected TextView packageName; 
     protected TextView packagePrice; 

     public ViewHolder(View view) { 
      super(view); 
      this.imageView = (ImageView) view.findViewById(R.id.packageImage); 
      this.packageName = (TextView) view.findViewById(R.id.packageName); 
      this.packagePrice = (TextView) view.findViewById(R.id.packagePrice); 
     } 
    } 

    public int getItemCount() { 
     return ListUtil.isEmpty(mainPageResponseList) ? 0 : mainPageResponseList.size(); 
    } 
} 

main_layout.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:id="@+id/main_content" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:background="@color/white" 
android:fitsSystemWindows="true"> 

<android.support.design.widget.AppBarLayout 
    android:id="@+id/appbar" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:fitsSystemWindows="true" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> 

    <android.support.design.widget.CollapsingToolbarLayout 
     android:id="@+id/collapsing_toolbar" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:fitsSystemWindows="true" 
     app:contentScrim="?attr/colorPrimary" 
     app:expandedTitleMarginEnd="64dp" 
     app:expandedTitleMarginStart="48dp" 
     app:layout_scrollFlags="scroll|exitUntilCollapsed"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:orientation="vertical" 
      android:visibility="visible"> 

      <RelativeLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content"> 

       <ImageView 
        android:id="@+id/ivHolidayMainImage" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:fitsSystemWindows="true" 
        android:scaleType="centerCrop" 
        app:layout_collapseMode="parallax" /> 

       <ImageView 
        android:id="@+id/ivHotelImage" 
        android:layout_width="match_parent" 
        android:layout_height="80dp" 
        android:layout_alignTop="@id/ivHolidayMainImage" 
      android:background="@drawable/gradient_from_up_hotel_image" /> 

       <RelativeLayout 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_marginLeft="10dp" 
        android:layout_marginRight="10dp" 
        android:layout_marginTop="250dp"> 
        <RelativeLayout 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_alignParentLeft="true"> 
         <TextView 
          android:id="@+id/mainPackageTitle" 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:text="Popular Pick" 
          android:textColor="@color/white" 
          android:textSize="12dp" /> 
         <TextView 
          android:id="@+id/mainPackageName" 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:layout_below="@+id/mainPackageTitle" 
          android:text="Andaman Islands" 
          android:textColor="@color/white" 
          android:textSize="18dp" /> 
        </RelativeLayout> 
        <RelativeLayout 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_alignParentRight="true" 
         android:layout_marginLeft="50dp" 
         android:layout_marginRight="10dp"> 
         <TextView 
          android:id="@+id/mainPackagePrice" 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:text="25000" 
          android:textColor="@color/white" 
          android:textSize="18dp" /> 
         <TextView 
          android:id="@+id/journeyType" 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:layout_below="@+id/mainPackagePrice" 
          android:text="Popular Pick" 
          android:textColor="@color/white" 
          android:textSize="12dp" /> 
        </RelativeLayout> 
       </RelativeLayout> 
      </RelativeLayout> 

      <ImageView 
       android:layout_width="match_parent" 
       android:layout_height="100dp" 
       android:layout_marginTop="-100dp" 
     android:background="@drawable/gradient_from_down_hotel_image" /> 
     </app.viaindia.views.ViaLinearLayout> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      app:layout_collapseMode="pin" 
      app:popupTheme="@style/ThemeOverlay.AppCompat.Light" /> 

    </android.support.design.widget.CollapsingToolbarLayout> 

</android.support.design.widget.AppBarLayout> 

<android.support.v7.widget.RecyclerView 
    android:id="@+id/main_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 

<android.support.design.widget.FloatingActionButton 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:clickable="true" 
    android:src="@drawable/ic_sms_black" 
    app:layout_anchor="@id/appbar" 
    app:layout_anchorGravity="bottom|right|end" /> 

vertical_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:orientation="vertical" 
android:paddingLeft="5dp" 
android:paddingRight="5dp"> 
<TextView 
    android:id="@+id/recycleViewTitle" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_margin="5dp" 
    android:text="Beaches" 
    android:textColor="@color/black_light" 
    android:textSize="20dp" /> 
<android.support.v7.widget.RecyclerView 
    android:id="@+id/recyclerView" 
    android:layout_width="match_parent" 
    android:layout_height="160dp" 
    android:layout_gravity="center" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 

holizontal_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:viaCustom="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:orientation="vertical"> 
<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 
    <ImageView 
     android:id="@+id/packageImage" 
     android:layout_width="wrap_content" 
     android:layout_height="230dp" 
     android:scaleType="fitXY" 
     android:src="@drawable/cheese_1" /> 
    <RelativeLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="160dp"> 
     <TextView 
      android:id="@+id/tvNightAndDays" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginLeft="10dp" 
      android:text="3 Night/4 days" 
      android:textColor="@color/white" /> 
    </RelativeLayout> 
</RelativeLayout> 

Answer 3

Prova a notifydatasetChanged() in onbindViewHolder() non setAdapter(). SetAdapter() richiede più tempo rispetto alla notifica della modifica del set di dati.